Colloidal quantum dot photodetectors enhanced by self-assembled plasmonic nanoparticles

被引：21

作者：

Huang, Ludan ^{[1
,2
]}

Tu, Chang-Ching ^{[2
]}

Lin, Lih Y. ^{[1
,2
]}

机构：

[1] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[2] Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.3567514

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Self-assembled colloidal plasmonic silver nanoparticles monolayers were integrated into solution-processed colloidal quantum dot (QD) photodetectors. We observed plasmon enhancement of photodetector responsivity over a board spectrum range (400-600 nm), with a 1.2-1.6 fold enhancement for a 440-nm-thick QD film device and a 2.4-3.3 fold enhancement for a 100-nm-thick QD device. The enhancement behavior was wavelength dependent with higher enhancement factor at longer wavelengths. The origins of responsivity enhancement were discussed. (C) 2011 American Institute of Physics. [doi:10.1063/1.3567514]

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